The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . s the forward movementof the gun. The cradle A rests on itstrunnions in seatings in the lower carriageand is elevated or depressed by the gearK. The last-named drives the elevatingarc L, which is attached to the cradle atM, the axis of the gun moving parallel tothe axis of the cradle. In fig. 86 the lowercarriage is almost entirely hidden by thegears carried on it, namely, the elevatinggear K, the traversing gear N, whichworks a spur pinion, gearing into the rackO attached to the pedestal P: theel
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . s the forward movementof the gun. The cradle A rests on itstrunnions in seatings in the lower carriageand is elevated or depressed by the gearK. The last-named drives the elevatingarc L, which is attached to the cradle atM, the axis of the gun moving parallel tothe axis of the cradle. In fig. 86 the lowercarriage is almost entirely hidden by thegears carried on it, namely, the elevatinggear K, the traversing gear N, whichworks a spur pinion, gearing into the rackO attached to the pedestal P: theelevation indicators Q and R for record-ing the angle of elevation of the gunand the bracket S which support the 6 armour plate T. The weightof the lower carriage, cradle and gun is taken by a horizontal ring ofhard steel balls resting on the top of a massive forged steel pivot U, the lower portion of which is shown supported in the cast-ironpedestal. The elevation indicator consists of a sector Q bolted tothe cradle trunnions; to its edge is attached a metal tape, the 23° ORDNANCE INAVAL GUNS. Fig. 87 Fig. 86.—British Mark II. Barbette Mounting for 6 87.—Longitudinal Section of Part of Cradle of Gun shown in fig. 13, through Axis of Buffer. other end of which is fixed to the spindle supporting a pointer,reading angles of elevation on the drum R. As the gun elevatesthe tape is paid out, the slack being taken in and the pointer re-volved by the action of a clock The mounting carries anautomatic sight (see Sights, Gun Sights). The British 12-pr. Gun.—A typical mounting for guns ofclass (c) is the British pedestal mounting for the 12-pr. mounting consists of a cradle, a pivot, a pedestal and cradle is a gunmetal casting, provided with trunnions thatrest in bearings on the pivot; the gun recoils in the upper portionof the cradle and the lower part of the latter is bored at the rearfor an hydraulic buffer and at th
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Keywords: ., bookcentury1900, bookdecade1910, bookidencyclopdiab, bookyear1910
